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I've successfully installed Snow Leopard on it, and then I tried OS X Lion which gives me "[ PCI configuration begin ]" and then it will give me "console 1024 x 768 @0xe0000000" if I add pci=off, I've tried Yosemite and Mavericks (and they give me the same results) but I'm trying to stay away from them as they probably don't support my graphics card, and weirdly, I've tried Mountain Lion which boots into the installer no problem but it doesn't show my hard drive, so i tried to install it onto a flash drive (which takes ages!) but then at the last moment it tells me that it was unsuccessful, so I try to boot into Mountain Lion and I get the same errors (except I haven't tried pci=off, but I really don't want to try again unless it's really needed.)

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I have browsed thru all forums and all threads for this card but apparently my system is still something special. With some cumbersome effort (none of the simple one-click ##### and other USB-Installers methods ever worked for me) I managed to install Sierra 10.12.5. However when booting is nearly finsihed I get the famous black screen which can be recovered by quickly unplug/plug the DP monitor cable leading finally to a proper initialisation of my 290X.

1.) RadeoDeInit is on, without this patch the screens stays dark forever2.) Booting with iGFX never works for me, I always get memory allocation errors during boot until I disable the Intel graphics completely.3.) I am on Clover 4318, newer version do not make any differences.
4.) I am using a System Configuration for an Imac 14,2. Most other configs do not make difference either.

I have not started again the nightmare of Framebuffer patching (as I remember from Yosemite) and I think it will not help as the card is recognised by Sierra but just not initialised.

I currently use an NVidia 760 with four displays: 1 x 4K; 2 x 1920x1200; 1 x 1920x1080. This mostly works, but I am considering replacing it with an AMD GPU - likely a Radeon 7970 - for two reasons:
I would like to add a fifth monitor, maybe even a sixth; I get small stutters and slowdowns with my NVidia, using both Native and NVidiaWeb drivers. It is a lot better than it was with my NVidia 980Ti, but it's still not perfectly smooth as it should be, especially when I have a full screen video playing while also doing UI movements like Swipe Left A Space or Mission Control.
I have just been told that it should be possible to access all display outputs on an AMD 79XX GPU, possibly requiring a custom SSDT and/or radeonDeInit? I've only ever had one AMD GPU and that was 8 years ago so I am not experienced with them. My NVidia 980Ti has five outputs, but can only use four at once. But I believe AMD's EyeFinity does allow it to use them all as separate displays.

Before I buy the GPU, I'd be most grateful if anyone could confirm that it should be possible to run five or six simultaneous displays on a card such as the ASUS HD 7970 DirectCU II (6 x DP outputs) or XFX AMD Radeon HD 7970 (2 x mini-DP; 1 x HDMI; 2 x DVI). With one display being 4K @ 60fps and the rest 1920x1200 or 1080P.

I have Googled on this a while but haven't yet found anyone discussing connecting more than four monitors to an AMD Hack I did see that the late-2013 Mac Pro (which uses 2 x AMD FirePro GPUs) states it can support "up to 6 Thunderbolt displays". So I know the OS can do it, it's just a question of whether a particular GPU can, and in a Hack setup.

Hi guys, i'm trying to help a friend of mine trying to install osx(possibly high sierra) on his pc with the following specs:

Amd fx8350
Asrock 990fx extreme 3
8gb of fury Kingston ddr3 ram(2x4)
Radeon hd 7950
128gb ssd( crucial m550)
A couple of hdds I don't remember the brand(maybe a seagate barracuda and a dumb old disk for data)
We tried to install it using the regular clover+high showers installer but we couldn't get it to reach the installer, then we tried osx-amd(don't know if i can talk about it there, sorry if i can't) and we still couldn't get to the installer.
Is there a guide i can use to install osx in that machin, i tried to search in the forum but i couldn't find it.